Pink lamp and coating therefor
AssigneeOsram Sylvania Inc.
InventorCynthia J. Labant
Life of this patent
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Abstract
An electric lamp which exhibits a pink color when energized and which comprises a vitreous, light transmissive envelope and enclosing a filament within and a coating on a surface of said envelope. The coating comprises about 42.5 w% calcined kaolin clay; about 42.5 w% synthetic precipitated silica; about 5 w% titanium dioxide; about 7 w% of chrome tin pink sphene; and about 3 w% red iron oxide.
Claims7
An electric lamp which exhibits a pink color when energized and which comprises a light transmissive envelope enclosing an electric light source and having a pink coating on a surface of said envelope, said coating containing a chrome tin pink inorganic pigment and a red iron oxide pigment, said coating being free of cadmium and selenium.
An electric lamp which exhibits a pink color when energized and which comprises a vitreous, light transmissive envelope and enclosing a filament within and a coating on a surface of said envelope, said coating comprising a chrome tin pink inorganic pigment and a red iron oxide pigment.
A composition comprising, in weight percent, about 42.5 w% calcined kaolin clay;
- about 42.5 w% synthetic precipitated silica;
- about 5 w% titanium dioxide;
- about 7 w% of chrome tin pink sphene;
- and about 3 w% red iron oxide.
An electric lamp which exhibits a pink color when energized and which comprises a vitreous, light transmissive envelope and enclosing a filament within and a coating on a surface of said envelope, said coating comprising about 42.5 w% calcined kaolin clay;
- about 42.5 w% synthetic precipitated silica;
- about 5 w% titanium dioxide;
- about 7 w% of chrome tin pink sphene;
- and about 3 w% red iron oxide.
Dependencies are inferred from the claim text.